Combination Light Switch Input Test

RHD type:


1.Before troubleshooting the wiper/washer system, perform the multiplex integrated control system test mode A troubleshooting.

2.Remove the dashboard lower cover.

3.Remove the steering colmn covers.

4.Disconnect the 8P connector (A) from the combination light switch (B).

5.Inspect the connector and socket terminals to be sure they are all making good contact.

  • If the terminals are bent, loose or corroded, repair them as nessesary, and recheck the system.
  • If the tarminals look OK, go to 6.

6.With the connector still disconnected, make these input tests at the connector.

  • If any test indicates a problem, find and correct the cause, then recheck the system.
  • If all the input tests prove OK, replace the combination light switch (combination switch control unit).

Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained 
3 BLK Under all conditions Check for continuity to ground:
There should be continuity. 
  • Poor ground (G601)
  • An open in the wire
 
8 WHT Under all conditions Check for voltage to ground:
There should be battery voltage. 
  • Blown No. 7 (10A) fuse in the under-dash fuse/relay box
  • An open in the wire
 
7 YEL Ignition switch ON (II) Check for voltage to ground:
There should be battery voltage. 
  • Blown No. 21 (7.5A) fuse in the under-dash fuse/relay box
  • An open in the wire
 
5 GRN Under all conditions Check for continuity between the No. 5 terminal and under-hood fuse/relay box 10P connector No. 5 terminal:
There should be continuity. 
  • An open in the wire
 
4 LT BLU Under all conditions Check for continuity between the No. 4 terminal and under-dash fuse/relay box X connector No. 27 terminal:
There should be continuity. 
  • An open in the wire
 
1 WHT Under all conditions Check for continuity bwtween the No. 1 terminal and under-hood fuse/relay box 10P connector No. 6 terminal:
There should be continuity. 
  • An open in the wire
 
2 LT BLU Under all conditions Check for continuity bwtween the No. 2 terminal and headlight adjuster control unit 14P connector No. 14 terminal:
There should be continuity. 
  • An open in the wire
 
6 PUR Under all conditions Check for continuity bwtween the No. 2 terminal and headlight washer unit 6P connector No. 5 terminal:
There should be continuity. 
  • An open in the wire